Lock



Oct. 6,1925 s. TREJO LOCK Filed m 10. 1923 v. mw v w .0 Mn T 4 i .7 a 3m 4 6 m x m v v Patented Oct. 6, 1925.

' GUIIiLEBMO ranao, or NEvifiYoIt oon Application filed August 10, 1923.Serial no. 356,677.

'To all whom it mag concern;-

..;Be it known that "I, .Grrnnnmziuo TnnJd' a subject of the .King ofSpainyresidingat NewYork in the county ofNew York and State'wof New.-York, yha-ve invented certain newiand xusefulflmprovements in Looks, of

' which the following isp'a; specification.

This invention relates "generally to looks, T having moreparticularreferenceto allock 1 for use on house-doors, the inventionhaving for an object to produce a novel lock com-- bining both theelements ofkey actuation. and'themaking of a successive series ofoperations.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

Fig. l of the drawings is a perspective view showing my improved lock. 2

Fig. 2 is a. horizontal sectional View thereof, this view being taken onthe line 2-2 of Fig. 3.

Fig. 3 is a longitudinal vertical sectional view taken on the line 3-3of Fig. 2.

Fig, 4 is a transverse vertical sectional view taken on the line 44= ofFig. 2.

Fig. 5 is a transverse vertical sectional view taken on the line 55 ofFig. 2.

Fig. 6 is a horizontal sectional View indicating the door to which myimproved lock is applied. a

As here embodied my improved lock comprises a rectangular casing 10which is fitted in a suitable mortise in the door 11. Slidable in thiscasing is a bolt 12 which may be projected through a suitable aperturein the end of the casing into the usual keeper element in the door frame13. The bolt 12 has formed in the top thereof an elongated The keyholes16 are covered normally by a-shutterz25 which is hingedas at 26 toithetop. ofthe casing'and is normally urged to 1 closed "position by meansof thespringx27 coiled :in a well known manner around thehinge-pintlexof the shutter. This shutter is preferably sunk a recessin. the frontwall I ofrthe casing "sodas to be flush withtheila tter.The shuttertis'normally held closed by two separate devices one of whichco mprisesa spring latch 29 carried by the shutter :andengaging behinda. lip 30in the casing. The other acomprises a 'bolt' 31 slidably heldin guides 32 on the shutter and having an oifset-end 31' adapted toengage behind the said lip 30, a. slot 33 being formed in the casing 10in which the bolt. is accommodated. This bolt has a laterally turnedfinger 34 on its upper end. These two locking members are adapted to bereleased by the key 35 which is used to move the main bolt, the end ofthe key being passed through the slot extension 18 at the side of theshutter with the bit 36 turned toward the latter. The bit is-then pushedalong the said slot behind the shutter and the key is then turned thebit then enga ing under the finger 3% on the bolt and li ts the latter.To enable the spring latch 29 to be lifted the key is formed with aseparate handle element 35 which is screwed into a suitable socket inthe shank of the key and is provided with a pin projection 37 whichpushed upward through a f is adapted to be small. opening 38 111 thecasing 10 to lift the latch from the lip 30.

indicated in the drawings the bolt 31 is spaced slightly from itskeeperelement 30 'when the shutter 25 is tightly closed sov that when thecatch 29 is released the shutter may move sufliciently to pass the endof the latch over the lip 30 before the bolt 31 is released.

As will be apparent, the keyholes through which access can be had to thebolt to shift the latter are covered on the outer side of the door bythe shutter. To; give notice if an attempt is made to insert a key orapicking tool through the exposed slot 18, or keyhole 20 a plate40' ismounted in the casing behind said slot and carries a contact member 41adapted to engage a fixed contact member42 to close a circuit to a bellor other signal if the plate is pushed inward in the casing. This plateis mounted for transverse movement in the casing on the guide members 43and is normally pressed orward by means of expansion springs 44 bearingthereon.

To lock the door from the inside without the use of the key a springpressed stud 50 may be mounted in a vertical slot 51 in the inner wallof the casing 10 and may be adapted to detachably engage in a suitablesocket in the bolt 12.

It is; believed that the manner of action of my improved lock Will bereadily understood from the above description. The key cannot beinserted for engagement with the bolt until the shutter 25 is opened andin order to do this the latch 29 must first be raised, and then the bolt31 lifted.

Having thus described my invention what I claim as new and desire toprotect by Letters Patent of the United States is as follows:

1. In a look, a casing having a number of keyholes in the face thereofunited by a slot, a bolt, a shutter covering the keyhole through whichaccess is had to the bolt, a locking element applied to the shutter,said locking element being accessible for release by the key forreleasing the said bolt when the said key is inserted into the saidslot.

2. In a look, a casing having a keyhole, a hinged shutter closing saidkeyhole, and a pair of locking elements holding said shutter closed,said locking elements being arranged for operation in a certain sequenceto release the said shutter.

- 3. In a look, a casing having a keyhole, a hinged shutter closing saidkeyhole, and a pair of locking elements holding said shutter closed,said locking elements being arranged for operation in a certain sequenceto release the said shutter, one of said locking elements consisting ofa spring latch and the other of a sliding bolt.

In testimony whereof I have affiXed my signature.

GUILLERMO T REJ O.

